\documentclass[a4paper, 11pt]{article}
%%% packages

%\usepackage{german}
%\usepackage[german]{babel}
\usepackage[latin1]{inputenc}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{latexsym}
\usepackage{verbatim}
\usepackage{epsfig}
\usepackage{fleqn}
\usepackage{color}
\usepackage[colorlinks=true, linkcolor=blue, anchorcolor=blue,
											citecolor=blue, filecolor=blue, menucolor=blue, pagecolor=blue,
											urlcolor=blue]{hyperref}
\usepackage{mathrsfs}
\usepackage{eufrak}
\usepackage{graphicx}
\usepackage{multicol}
\usepackage{amsbsy}
\usepackage{bm}
\usepackage[nonamebreak,square]{natbib}
%\usepackage[ruled]{algorithm2e}
%\setcitestyle{authoryear,aysep={},yysep={;},numbers}

%%% page layout

\parindent0pt
\parskip1ex
\oddsidemargin-0.6cm
\evensidemargin-0.6cm
\topmargin-1cm
\textheight23cm
\textwidth15.1cm
\headsep0.5cm
\footskip0.5cm
%\usepackage{E:/R_Installation/share/texmf/Sweave}
\pagestyle{plain}

%%% Operators

\newcommand{\R}{{\mathbb R}}
\newcommand{\E}{{\mathbb E}}
\newcommand{\p}{{\mathbb P}}
\newcommand{\X}{{\mathcal X}}
\newcommand{\Y}{{\mathcal Y}}
\newcommand{\s}{{\mathscr S}}
\newcommand{\F}{{\mathscr F}}
\newcommand{\XX}{{\mathscr X}}
\newcommand{\h}{{\mathcal H}}
\newcommand{\LL}{{\mathcal L}}
\DeclareMathOperator*{\var}{var}
\DeclareMathOperator*{\cov}{cov}
\DeclareMathOperator*{\tr}{tr}
\DeclareMathOperator*{\diag}{diag}
\providecommand{\norm}[1]{\lVert#1\rVert}
\providecommand{\sp}{\langle \cdot, \cdot \rangle}
\providecommand{\M}[1]{\textbf#1}
\providecommand{\B}[1]{\bm#1}
\providecommand{\T}{\top}
\newcommand{\sign}{\operatorname{sign}}

\def\su{\sum_{i=1}^n}
\def\etall{\mbox{{\it et al., }}}
\def\etal{\mbox{{\it et al. }}}
\newcommand{\blanco}[1]{  }



